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N o. $6,872. Patented lan..3 I899,- J. m. ANDERSEN. ELECTRIC connucTon' SUPPORT.

(Application filed Feb. 8. 1898.) I (No Model.) 3 Sheets-Sheet I.

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N0. 6l6,872. Patented Ian. 3, I899. J. m. ANDERSEN.

ELECTRIC OONDUGTCR SUPPORT.

(Appliqation filed Fey. 8, 1898.) (No Model.) 3 Sheets-Sheet 2.

WI M55555 INVENTEJR- ATTfY- m: NORRIS wins 90, mumm wuumurom n. c.

No. 6|6,872 Patented Jan. 3, I899. J. M. ANDERSEN.

ELECTRIC CONDUCTOR SUPPORT;

(Applicatioli flied Feb. s, 1898.)

3 Sheets-sheaf 3 (No Model.)

WITNESSES.

INVENTUR.

ATTYq l SNITED STATES PATENT Prion.

JOHAN M. ANDERSEN, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO ALBERT ANDERSON, OF SAME PLACE.

ELECTRIC-CONDUCTOR SUPPORT.

SPECIFICATION forming part of Letters Patent No. 616,872, dated January 3, 1899.

Application filed February 8,1898. Serial No. 669,478. (No model.)

To aZZ whom it may concern:

Be it known that I, J OHAN M. ANDERSEN, a citizen of the United States, residing in Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Electric-Conductor Supp0rts,of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawing's representing like parts.

This invention relates to electric-conductor supports for overhead conductors and is herein shown as embodied in an adjustable crossover for overhead trolley-wires.

My present invention has for its object to provide a crossover of improved construction, as will be described, whereby a smaller, lighter, and cheaper crossover may be obtained without impairing the efficiency of the same. 7

The particular features of thisinvention will be pointed out in the claims at the end of this specification.

Figure 1 is a top or plan view, with parts broken away, of a crossover embodying this invention; Fig. 2, an under side View of the crossover shown in Fig. 1; Fig. 3, a section of the crossover shown in Fig. 1 on the irregular line 3 3'; Fig. 4, a section and elevation of the crossover shown in Fig. 1, the section being taken on the line 4 4; Fig. 5, a sectional detail to be referred to; Fig. 6, a detail in elevation to be referred to, and Figs. 7 and 8 details to be referred to.

The crossover herein shown as embodying this invention is provided with four metal arms A A A A of a novel construction, as will be described, which are arranged in pairs substantially diametrically opposite and which carry the crossing trolley-wires or line conductors A A. o

The metallic arms referred to are preferably of like construction, and therefore a detail description of one will suffioe for all.

Referring to Figs. 3 and 4, the metal arm A comprises a substantially vertical plate or web at, having its top made substantially straight for a portion of its length at the rear of the said web and then inclined downward toward the front end of said plate or web and direction as the flange a and gradually thickened toward the rear end of the said web, so as to form a gradually-inclined upper 'surface 2 (see Fig. 3) and a substantially straight bottom surface 3. The bottom flange a at the rear of the upper end of the inclined surface 2 is widened on both sides of the web or plate a, so as to form flanges or lateral ribs a a, with which the flanges of the trolley-wheel are adapted to engage. The lateral ribs or flanges a a are composed of two parts or sections 4 5, occupying different planes and connected by a vertical port-ion 6. .(See Fig. 4.) The parts or sections 5 are adapted to project over the upper surface of a disk or plate 0., of fiber or other suitable insulating material, which disk is made of such thickness that its bottom surface is substantially in a straight line with the rear portion of the bottom surface of the sections 4 of the ribs or flanges a 0. the front portion of the bottom surfaces of the sections 4 being gradually curved, so as to enable the flanges of the trolley-wheel to engage the sec; tions 4 without the formation of an arc.

The metal arms are each preferably de-' tachably and adj ustably secured to the disk or plate by means of a finger or projection a on the sections 5 of the ribs a a", (see Fig. 3,) which extends into an annular groove, slot, or channel 0. in the upper surface of the said disk or plate, and by means of a clamping-plate a secured to the section 5 of the ribs a a", as by screws c0 and extended under the edge of the disk or plate a, the end of the clamping-plate abutting against an annular shoulder (r on the disk or plate 60 To obtain increased clamping effect with the clamping-plate 0. the latter is provided on its upper surface, at one end, with a projection 0. (see Fig. 6,) which bears against the under side of the section 5 of the lateral ribs a a and acts as a fulcrum, whereby the metal arm A may be more firmly attached to the disk a.

The thickened flange a of each metal arm of the crossover is provided with fingers or extensions Z) Z), (see Fig. 2,) between which is inserted a piece of fiber or other insulating material, one for each arm, and marked 19 b 0* N, which are firmly secured, as by screws Z). (See Figs. 3 and 4.) The fiber pieces Z1 12 b extend toward and to near the center of the disk a and practically form non-conducting contiuuations of the metal arms A A A A, being separated near the center of the disk a a sufficient distance to permit of the passage of the trolley-wheel from one piece, as 11 to its cooperating piece 11 without striking the pieces 19 b and vice versa.

The trolley-wires A A extend across and above the insulating-disk (L15 and are electrically separated from one another by insulating material, preferably made as herein shown and consisting of a turtle-shaped block or piece b (see Figs. 1 and 8,) adapted to rest on the disk (r between the metal arms A A A A and provided with a longitudinal groove 1) (see Fig. 7) in its under side to fit over one of the trolley-wires, herein shown as the wire A. The insulating-block Z2 is provided with recesses b Z2 Z9 1) at its sides and ends and is provided between said recesses with substantially diagonally opposite lugs or projections Z)" Z1 Z2 b adapted to enter the groove a in the disk (0. cesses Z9 7) h 11 are adapted to receive the ends of the lateral ribs a a on the metal arms, which ribs project beyond the annular groove (1.", as shown in Fig. 8. The trolley-Wire A is passed over the top of the block Z2 as shown in Fig. 3, between it and an antibuckling disk or plate I), preferably of insulating material, which rests upon suitable shoulders Z9 formed on the metal arms A to A inclusive. The antibucklingdisk or plate Z2 may be firmly secured in position by washers Z1 and screwsb The central portions of the crossover may be protected from rain, &c., by a conical hood I), attached to the metal arms by screws b, and preferably each metal arm is provided with a shoulder 73 against which the edge of the hood bears, as shown in Fig. 3. By means of the non-conducting extensions Z1 6 b b of the lower part or surfaces of the.

metal arms danger of a short or cross circuit being formed by the trolley-wheel as it passes across the insulating-disk (L15 is avoided, as is also the liability of an are being carried by the trolley-wheel from one metal arm to the opposite arm.

By reason of the compact form of the crossover the metal arms carrying one trolleywire, as A are separated near their inner ends from the metal arms carrying the trolley-Wire A but a substantially short distance, and to avoid possibility of a cross or short circuit being formed by the trolley-wheel jumping 0E from one arm-as, for instance, the arm A-- The reand striking against the adjacent arm A, I have provided in the present instance each metal arm on one side with insulating material which practically forms an insulating-covering for one side of said metal arms. The insulating side covering may be made as herein shown and consists of a piece or strip (Z of fiber or other suitable insulating material of substantially the shape of the metal plate or web a of each arm, and which is fastened thereto outside of the lateral ribs a", as by screws d, extended into suitable bosses d on said plate or web. The insulating pieces or strips (1 are preferably extended over the disk 0. as shown in Fig. 4, into the recesses b b I) 19 in the insulating block or piece D and are provided at their lower edge with lips (1 which project beyond the depending lugs Z)" 11" b 1) on the insulating block or piece b and the pieces or strips cl are also preferably provided with lips d", which extend under the disk at and abut against the shoulder a on said disk.

To avoid burning away of the front ends of the metal arms, I prefer to provide the said arms with substantially trough-shaped auxiliary terminals d preferably of sheet-copper, which terminals are detachably secured to the front ends of the metal arms by pins (1 By constructing the metal arms as herein shown and described I am enabled to materially lighten and cheapen the crossover without sacrifice to its strength and efficiency.

By reference to Figs. 3 and t it will be observed that the under surfaces of the metal arms and their non-conducting extensions are in substantially the same horizontal plane, so that the trolley-wheel runs in a substantially straight path when passing from the trolley-wire on one side of the crossover to the same trolley-wire on the other side thereof.

By reference to Figs. 3 and 4- it will be noticed that the lateral flanges a on the cooperating metal arms A A A A extend in opposite directions, whereby a single pattern may be used for all the arms, thereby materi-' ally cheapening the cost of construction.

I prefer to provide the insulating-disk a with a continuous circular channel or groove a"; but it is evident that a plurality of disconnected grooves or channels in the same circle might be made, according to the degree of adj ustability of the metal arms of the cross over.

I claim- 1. In an electric-conductor support, the combination of the following instrumentalities, Viz: an insulating disk or plate provided with a circular slot or channel, a plurality of conducting arms extended from said plate or disk and provided with projections to engage said slot or channel, and means to secure said arms to said disk or plate, substantially as described.

2. In an electricconductor support, the combination of the following instrumentalities, viz: an insulating disk or plate provided with a groove, a plurality of metal arms secured thereto to carry theconductors which cross each other above said plate or disk, and a block or piece of insulating material interposed between said crossing conductors and provided with lugs to enter the groove in the insulating disk or plate, substantially as described.

3. In an electric-conductor support, the combination of the following instrumentalities, viz: a plurality of radiating metal arms adapted to carry crossing conductors, and substantially trough-shaped auxiliary sheetmetal terminals detachably secured to the outer ends of said arms and extended underneath said arms and conductors, substantially as described.

4. In an electric -conductor support, the combination of the following instrumentalities, viz: an insulating plate or disk, and a plurality of metal arms secured thereto and each consisting of a vertical plate or web provided with a lateral flange extended from one side of its upper edge and provided with lateral ribs extended from both sides of its lower edge and comprising sections 4, 5, occupying different planes, the under side of the section 4 being substantially in line with the under side of the insulating disk or plate and the section 5 being extended over said disk or plate, and means to secure said arms to the said disk or plate, substantially as described.

5. In an electric-conductor support, the combination of the following instrumentalities, viz: an insulating disk or plate, a plurality of metal arms radiating therefrom and secured thereto, and insulating material interposed between adjacent metal arms and secured to one of said arms to substantially cover its side adjacent to the other of said arms, substantially as and for the purpose specified.

6. In an electric-conductor support, the

rality of metal arms attached thereto in pairs substantially diametrically opposite, each of said metal arms comprising a substantiallyvertical metal plate or web having a lateral flange extended from its upper edge on one side of said plate or web and provided with lateral ribs extended from both sides of said plate or web near its bottom, the top flanges on substantially diametrically opposite arms extending in opposite directions, substantially as described.

7. In an electric-conductor support, the combination of the following instrumentali ties, viz: an insulating disk or plate, a plurality of metal arms radiating therefrom and having the under surface of their front portion substantially in line with the under surface of the insulating disk or plate, strips or pieces of insulating material secured to the under side of said metal arms and extended beyond the edge of the insulating disk or.

plate toward the center thereof, and means to clamp the metal arms to said insulating disk or plate, substantially as described.

8. In an electric-conductor support, the combination of the following instrumentalities, viz: an insulating disk or plate, a plurality of metal arms adj ustably secured thereto and provided with lateral ribs which extend over the upper surface of said insulating disk or plate, and having insulating-pieces extended toward the center of said disk or plate on its under side, and means to detachably secure said metal arms to said disk or plate, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

J OHAN M. ANDERSEN.

Witnesses:

JAS. H. CHURCHILL, J. ll/IURPHY. 

